io_uring: remove unnecessary NULL checks

The "kmsg" pointer can't be NULL and we have already dereferenced it so
a check here would be useless.
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

fs/io_uring.c

@@ -3075,7 +3075,7 @@ static int io_sendmsg(struct io_kiocb *req, struct io_kiocb **nxt,
 			if (req->io)
 				return -EAGAIN;
 			if (io_alloc_async_ctx(req)) {
-				if (kmsg && kmsg->iov != kmsg->fast_iov)
+				if (kmsg->iov != kmsg->fast_iov)
 					kfree(kmsg->iov);
 				return -ENOMEM;
 			}
@@ -3229,7 +3229,7 @@ static int io_recvmsg(struct io_kiocb *req, struct io_kiocb **nxt,
 			if (req->io)
 				return -EAGAIN;
 			if (io_alloc_async_ctx(req)) {
-				if (kmsg && kmsg->iov != kmsg->fast_iov)
+				if (kmsg->iov != kmsg->fast_iov)
 					kfree(kmsg->iov);
 				return -ENOMEM;
 			}